ENT is ear nose throat specialist, you need a referral and they do tests to find exact cause of your vertiogo problems and try to work to help it. With mine when it comes on I feel like I am on a boat, like the ground is swaying. Mine was diagnosed as fluid in my inner ear causing it.
Your Dr sounds very unhelpful so I would definately get a referal to see someone. In meantime avoid salty foods and caffeine to see how that helps.